Across
- 2. Planet that rotates on its side
- 4. ___'s law relates galaxy distance to recession velocity
- 6. Astrophotographer's camera type
- 8. Spin on one's axis
- 9. Type of universe that will expand forever
- 12. Orbit around a central body
- 14. Of our local star
- 16. Spectral shift indicating a galaxy is moving away
- 17. Season of maximum solar heating
- 21. The Red Planet
- 22. Outermost planet in our solar system
- 23. Study of the universe's origin and evolution
- 25. Measure of an orbit's deviation from circular
- 27. ___ craters are left by meteorites
Down
- 1. Solar system's innermost planet
- 3. Instrument that analyzes starlight by wavelength
- 5. ___ star (what our Sun will become)
- 7. Milky Way, for one
- 10. Icy visitors with glowing tails
- 11. Planet whose day is longer than its year
- 13. Shape of every planet's orbit
- 14. Explosive stellar endings
- 15. Solar system's largest planet
- 18. Earth's reflected solar illumination
- 19. Dense stellar remnant type
- 20. Like stellar nurseries in space
- 21. What a meteorite is while traveling through the atmosphere
- 24. Planet famous for its prominent rings
- 26. Third rock from the Sun